The beating heart of the Porsche 911 Carrera 4 (and Turbo) is the company's own proprietary wet-clutch all-wheel-drive system. Its traction dynamics are what Porsche owners and enthusiasts have come to know and trust for generations. Reports are now circulating, however, that Stuttgart is preparing to dump its own tried-and-tested in-house four-wheel-drive system for an outsourced Haldex transmission, reportedly equipped with the latest electronic limited slip differential. The rumors come at an interesting time for Porsche, considering that a wide range of vehicles from the Volkswagen Group into which Porsche just acquired majority interest - including VWs, SEATs, Skodas, Audis and even the Bugatti Veyron - use the Haldex. If the reports are accurate, the system could be out on the next iteration of the Porsche 911 Carrera 4 as well as the 911 Turbo spied while undergoing cold weather testing in Scandinavia just last month.

[Source: World Car Fans]